What must be configured on the Cisco Unity Express host router prior to installation of the CUE module?（）

• A、Set up the Network Time Protocol server. 
• B、Install the files needed to run the web-based GUI. 
• C、Set up routing and IP addressing on the service module and the interface service engine. 
• D、Configure a session initiation protocol dial peer for connecting calls to the voice mail and Auto Attendant features.